Created attachment 1103386 [details]
Untested fix.

Description of problem:
Installing system capable of gcc -m32 is tricky.

Version-Release number of selected component (if applicable):
glibc-2.22-6.fc23

How reproducible:
Always.

Steps to Reproduce:
dnf install glibc-devel.i686
gcc -o 1 1.c -Wall -g -m32

Actual results:
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/5.1.1/libgcc_s.so when searching for -lgcc_s
/usr/bin/ld: cannot find -lgcc_s
collect2: error: ld returned 1 exit status

Expected results:
Nothing, compiled code.

Additional info:
Besides the attached fix glibc.spec apparently has many more Requires missing %{?_isa} but that is not a topic of this Bug.
Also this page is also missing %{?_isa} but I cannot fix that:
  https://fedoraproject.org/wiki/Packaging:C_and_C%2B%2B#Packaging_Q.26A

# gcc -o 1 1.c -Wall -g
# gcc -o 1 1.c -Wall -g -m32
/usr/bin/ld: cannot find crt1.o: No such file or directory
/usr/bin/ld: cannot find crti.o: No such file or directory
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/5.1.1/libgcc_s.so when searching for -lgcc_s
/usr/bin/ld: cannot find -lgcc_s
/usr/bin/ld: cannot find -lc
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/5.1.1/libgcc_s.so when searching for -lgcc_s
/usr/bin/ld: cannot find -lgcc_s
/usr/bin/ld: cannot find crtn.o: No such file or directory
collect2: error: ld returned 1 exit status
# dnf install glibc-devel.i686
Installed:
  glibc.i686 2.22-6.fc23
  glibc-devel.i686 2.22-6.fc23
  nss-softokn-freebl.i686 3.21.0-1.1.fc23
# gcc -o 1 1.c -Wall -g -m32
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/5.1.1/libgcc_s.so when searching for -lgcc_s
/usr/bin/ld: cannot find -lgcc_s
collect2: error: ld returned 1 exit status
# dnf install libgcc.i686
Installed:
  libgcc.i686 5.1.1-4.fc23
# gcc -o 1 1.c -Wall -g -m32
# _